Like the 6800, the 6200 - along with a parallel offering, the 6250 - supports Nvidia's PureVideo hi-def video-oriented image enhancement technology. PureVideo leverages the three GPUs' support of DirectX 9.0 Shader Model 3.0.

However, the 6200 and 6250 also support TurboCache, a feature absent from the 6800. TurboCache allows the GPU to use main memory, accessed via the PCI Express bus, as video RAM, a technique originally included in the AGP spec.

Nvidia arch-rival ATI has just such a system of its own, dubbed HyperMemory. Both companies are pitching their respective new incarnations of the old AGP feature as a way to let notebook vendors save money by cutting the amount of memory their machines dedicate to the graphics chip.

Nvidia said Sony, for one, has agreed to use the new mobile GPU in a pair of Vaio notebooks. ®